Biomolecules — Biology STD 11 Science — Question

Plants have no circulatory system? Then how cells manage intercellular transport?

Lata was surprised to see cockroaches used as specimen in her college laboratory. She asked her teacher the reason for cockroach being used as experimental animal in laboratory. What would be the probable reason given by her teacher?

Can improper kidney function lead to brittle bones? Justify your answer.

Write the constituents of prokaryotic cytoplasm.

What is the function of ribosomal RNA?

What enables the ear pinna to be folded and twisted while the nose tip can’t be twisted?

Write function of collenchyma tissue.

After learning organization of cell, to test one of the postulates of cell theory, Ananya requested her teacher to guide and allow her to perform a small experiment. The aim of the experiment Avas to form new cells in the laboratory using isolated cellular organelles from other cells. Though Ananya did not succeed to form new cells, teacher-guided and motivated her explaining why experiment performed by them failed.
1. Which postulate Ananya was willing to test and why new cells failed to form from the isolated organelles from other cells?
2. From the above mentioned data could you guess which type of cells they were trying to form whether eukaryote or prokaryote?

While observing a section, many scattered vascular bundles could be seen. Teacher said, in spite of this large number the stem cannot grow in girth. Why?

Draw neat and labelled diagram of Anaphase.